diff options
| author |   Olivier Moysan <olivier.moysan@st.com> | 2019-06-19 15:03:48 +0200 |
|---|---|---|
| committer |   Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-06-22 10:20:21 +0100 |
| commit | c6013bf50e2a2a94ab3d012e191096432aa50c6f (patch) | |
| tree | 398ec109faa09a80c35e3c3de05233be53b26738 /drivers/iio | |
| parent | iio: adc: stm32-dfsdm: fix output resolution (diff) | |
| download | linux-dev-c6013bf50e2a2a94ab3d012e191096432aa50c6f.tar.xz linux-dev-c6013bf50e2a2a94ab3d012e191096432aa50c6f.zip | |
iio: adc: stm32-dfsdm: fix data type
Fix the data type as DFSDM raw output is complements 2,
24bits left aligned in a 32-bit register.
This change does not affect AUDIO path
- Set data as signed for IIO (as for AUDIO)
- Set 8 bit right shift for IIO.
The 8 LSBs bits of data contains channel info and are masked.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Fixes: e2e6771c6462 ("IIO: ADC: add STM32 DFSDM sigma delta ADC support")
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/stm32-dfsdm-adc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index cb596f104919..6b90a40882f2 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -1365,11 +1365,11 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev, BIT(IIO_CHAN_INFO_SAMP_FREQ); if (adc->dev_data->type == DFSDM_AUDIO) { - ch->scan_type.sign = 's'; ch->ext_info = dfsdm_adc_audio_ext_info; } else { - ch->scan_type.sign = 'u'; + ch->scan_type.shift = 8; } + ch->scan_type.sign = 's'; ch->scan_type.realbits = 24; ch->scan_type.storagebits = 32; |